Starting and ignition system



EN?? AND IGNITION SYSTEM vay Patented Oct. 12, 1926.

UNITED STATES PTENTOFFICE.

HENRY R. DAVIES, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, T THEELECTRIC AUTO-LITE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

STARTING AND IGNITION SYSTEM.

Application led May 31, 1921. Serial No. 473,651.

This invention relates to starting and ignition systems t'or internalcombustion engines wherein the same battery is employed to supply energyfor starting the engine and lor 'operating the ignition system.

In systems at present in common use `where a storage battery is employedto operate an electric motor tor starting the engine and the samebattery supplies energy to the ignition system ot the engine the heavydemand made upon the battery by the starting motor 'frequently causes anabnormally low potential across the battery terminals with the resultthat the ignition spark is Wealr and incllicient. This difficulty is allthe more present in cold Weather when the battery is less active due toits lower temperature and when the eneine being cold naturally startsharder, due to a variety of causes.

An -object ot this invention is to provide means ior partially, it notWholly, compensating the ignition system tor the. Voltage drop ot thebattery due to the operation of the starting motor.

the description proceeds.

The present invention contemplates the provision or means whereby duringnormal running oli the engine the induction coil supplying the ignitionspark will operate in the usual manner but during the operation of thestarting motor will have its cflect augmented in an effort to compensatefor the voltage drop of the battery. This result is accomplished byproviding an auxiliary Winding in circuit with the starting motor andarranging it adjacent the induction coil and in such a manner that itsiux tends to interlink the secondary Winding in a reverse direction tothat of the primary Winding. Preferably the number of ampere-turns ofthe primary Winding and of the auxiliary Winding are substantially thesame.

In the drawing Figure 1 is a diagrammatic representation of the appartusand circuit arrangement of my invention and Fig. 2 illustrates amodification.

Referring to Fig. 1, a generator 5 of the third brush type is shownconnected to a. storage battery 6 by Wires 7 and 8 in the circuit ofwhich is a cut-out 9 having the usual series and shuntwindings. loadcircuit 1G is also shown connected to Other and more par-v ticularobjects will appear hereinafter asv wires 7 and 8, consisting of lamps11- controlled by the switch 12. Connected also to the storage battery 6by means of Wires 15 and 16 is a dynamo-electric machine 17 comprising aseries starting motor, the circuit of which is controlled by a startingswitch 18. An induction coil having a core 2O has its primary winding9.1. connected by means ot wires :23 and Q-t to the Wires l5 and 8,respectively. and in series with the primary winding is shown acani-operated interrupter 227. about which is bridged. a condenser 26.'The secondary winding 28 o't the induction coil is grounded at one endas at 29 and has its opposite end connected to the distributor arni SOof a distributor 31 which, in the form illustrated. has tour points 3Q.each of which connects with a spark gap 33 representing a spar-lr plug.and then to ground 345. As clearly shown in i. ot the drawing, the coreQ0 of the induction coil has an extension at one end which serves tocarry a Winding' 3G which is connected in series with starting motor 17and switch 18, rlfhis winding 36 preferably has approximately the samenumber ot ampere-turns as the primary `winding 21 and inasmuch as thecurrent carried thereby is Very much greater than the current bythe'primary Winding when the interrupter contacts are closed, the actualnumber ot turns ot' the Winding 3G are comparatively 'few in number. Amost important feature `oill this invention is that the direction of thecurrent in the winding 36 is such that thetlux produced thereby isopposed to the tina produced by the primary Winding 21.

In the operation ot the device shown in Fig. 1 when thestarting switch,18 is closed and when the interrupter Q5 closes the pitimary ignitioncircuit the tujo windings ill and4 88 produce magnetic itiuXes in theirrespective portions ot' the core 2O in opposite directions .and it theampere-turns ot' the two windings are substantially equal. as ispreferable, the fluxes produced by these tiro windings are substantiallyequal and opposits. At the instant that the intcrrupter opens thecircuit of the primary winding the Hui; produced thereby immediatelycollapses While the flux of the Winding 36. being no longer opposed.,tends tov extend more less through the entire length ol the core andinduces in the secondary Wind.- ing a potentiein the saine direc yonthat Dil induced by starting motor for said engine, bate y.

:3 ri`he eiicct. therefore, ot` pror ditional winding 3@ on the cor tioncoil and in series with the starting motor is io increase the eli'ect ott ie primary winding. producing a higher secondary potential andconsequently a hotter spari: at the spark plugs.

Although the winding' 36 is shown in Fig. l as beine' located upon anextension of the core and as displaced axially from the primary andsecondary windings, it is ob- .'ious that it desired the core extensionmay be omitted and tbe auxiliary winding` may surround that part ot' thecore carrying the primary and secondary windings.

In the inodilication illustrated by Fig. 2 the same apparatus isemployed and couucctcd as in Fig. l with the exception that the coreextension turned through i800 forming' a @shaped core 20" i l theprimary and secondary windings 2i and 28, respectiyely7 carried by onearm of the core while the auxiliary winding' 3G is carried by the otherarm. rlie primary winding and the auxiliary winding are connected iu theprece@lingy iorin to produce opposing ilu in the core and are preferablyot' al .proximateiy the saine number of ampereturns. y'Ehe operation ofthis 'orni ot the inrcntion is similaito `that ox Fig. i and willtherefore not be again described.

inasmuch as the invention herein disclosed is susceptible o" variousother embodiments and as various changes might be made in theembculiment set forth, it is to be understood that all matter describedabove or shown in Vthe accompanying drawingx is to be interpreted asillustrative only? and not in a limiting sense.

Haring thus described my inyentionE what laiin es new and desire tosecure by Letiatent, in an electric starting and ignition sysfor aninternal combustion engine, a

the collapsine' nriniary dun.

l ne this adit 1 e of the induce er is:

L Lem I circuit connections between said battery and said motor? anignition coil comprising a core. a primary winding` and a secondarywinding, said primary winding being?r connected to said battery andsaid. core haring' an extension at one end thereof. and an auxiliarywindingl on said extension connected in series with said motor, thepolarity ot said auxiliary windingY being reversed to that of theprimary winding.

2. in an electric starting and ignition system for an internalcombustion engine. a starting motor tor said engine, a storage battery,circuit connections including a starting switch between said motor andsaid battery, an ignition coil having a core, a primary winding thereon,an interrupter, circuit connections between said battery, interruptorand primary winding. a secondary winding inductiiely related to saidprimary winding, said core haring an extension :it one end and a thirdwiiulingil thereon connected in series with said motor and said startingswitch. the polarity ot' said winding; being opposed to that oi theprimary coil* 3. in an electric starting and. ignition system for aninternal combustion engine, a starting motor ior lsaid engine. a storagebatteryr` circuit connect-ions iucluning' a .ist artinf; switch betweensaid motor and said battcry, an ignition coil hayiiie` a core. a primarywinding?r thereon` an interrupter. circuit connections between saidbattery, interruptor and primary winding', a secondary windinginductiyely related 'to said primary winding., said core having anextension one end and a third winding thereon connested in series withsaid motor-,and said ,starting switch, said winding bein; r wound insuch direction on the core as to oppose magnetically the induction otthe primary.,

in testimony whereof I ailx my signature.

HENRY Eni/TES.

